Folau will get a great contract where ever he plays in Qld. He'll have more than enough money either way he goes, but he'll also have his family around him. His lucky, in the sense that clubs will be willing to give him what his worth, and it wouldn't surprise me if he gets offers from most clubs.
Again, i don't see the whole 'home sickness' as a major issue. But Israel will be the sort of player that will get to have his cake and eat it too.
I'd be disappointed in him though if he didn't fulfill his current contract (and i know that hasn't been mentioned).